Keywords: Postal Service Employees - Mail Canceling - 8c 1973 issue U.S. stamp.jpg en Postal Service Employees - Mail Canceling - 8-cent 1973 issue U S stamp Text Thousands of machines buildings and vehicles must be operated and maintained to keep your mail moving U S MAIL logo People serving you 1973-04-30 U S Postal Service; National Postal Museum http //arago si edu/category_2034485 html Postal Service Employees Issue Bureau of Engraving and Printing Designed by Edward Vebell other versions PD-USGov Postal Service Employees Issue |